Instability of internal right knee prosthesis, sequela

This code signifies a chronic or persistent instability specifically affecting an internal prosthetic device within the right knee joint. It indicates a long-term complication or sequela of the initial prosthesis implantation, rather than an acute event. The instability can manifest as loosening, subluxation, or other forms of mechanical failure impacting the prosthesis's function.

Use this code for patients presenting with ongoing symptoms related to a previously implanted right knee prosthesis that is now unstable. This applies to follow-up encounters for chronic instability, or when the instability is identified as the underlying cause for further intervention (e.g., revision surgery planning). It is appropriate when the instability is a persistent issue, not an acute dislocation or fracture.

• Always code the specific type of instability if known (e.g., loosening, subluxation) in addition to this code, if a more specific code is available.
• Ensure documentation clearly states the laterality (right knee) and the internal nature of the prosthesis.
• This code requires a 7th character "S" for sequela, indicating a complication or condition that is the result of a previous injury or disease.